CN115981624A - WPF-based drop-down box control element screening method and server - Google Patents
WPF-based drop-down box control element screening method and server Download PDFInfo
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- CN115981624A CN115981624A CN202211677453.9A CN202211677453A CN115981624A CN 115981624 A CN115981624 A CN 115981624A CN 202211677453 A CN202211677453 A CN 202211677453A CN 115981624 A CN115981624 A CN 115981624A
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- 238000012216 screening Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000001419 dependent effect Effects 0.000 claims description 16
- 238000003491 array Methods 0.000 claims description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention discloses a WPF-based drop-down box control element screening method and a server, wherein the method comprises the following steps of: s1: creating a user control UserControl, and creating a Button in the user control UserControl; s2: placing an item control ItemsControl in the Button, and popping up a drop-down box outwards when acquiring an external instruction; s3: setting a dependency attribute in a data source of the drop-down box, assigning an array to the dependency attribute, and screening elements, thereby hiding elements selected by other drop-down boxes in the drop-down box of the WPF, only keeping the elements selected by the current drop-down box and elements not selected by other drop-down boxes, and achieving the purpose of self-defining the drop-down box control of the WPF.
Description
Technical Field
The invention relates to the technical field of WPF controls, in particular to a method and a server for screening elements of a pull-down box control based on WPF.
Background
WPF, collectively referred to as: windows Presentation Foundation, which belongs to a Windows-based user interface Framework, is a part of NET Framework 3.0. The method provides a uniform programming model, language and framework, really performs the work of separating interface designers and developers, and provides a brand-new multimedia interaction user graphical interface.
However, when a plurality of pull-down boxes in the WPF share the same set of data, the data often appears repeatedly in other pull-down boxes after being selected in a certain pull-down box, and the requirement that the same data can only be selected once when the pull-down boxes are used cannot be met, which brings obvious trouble to the work of designers and developers.
Disclosure of Invention
In order to overcome the defects of the prior art, an object of the present invention is to provide a method for screening elements of a pull-down box control based on WPF, which can solve the problem that when a plurality of pull-down boxes in the existing WPF share the same set of data, the data is still repeatedly appeared in other pull-down boxes after being selected.
The invention also aims to provide a WPF-based drop-down box control element screening server, which can solve the problem that when a plurality of drop-down boxes in the existing WPF share the same group of data, the data can still repeatedly appear in other drop-down boxes after being selected.
In order to achieve one of the purposes, the technical scheme adopted by the invention is as follows:
a WPF-based drop-down box control element screening method comprises the following steps:
s1: creating a user control UserControl, and creating a Button in the user control UserControl;
s2: placing an item control ItemsControl in the Button, and popping up a drop-down box outwards when acquiring an external instruction;
s3: and setting a dependent attribute in a data source of the drop-down box, assigning an array to the dependent attribute, and screening elements.
Preferably, the step S3 is specifically realized by the following steps:
s31: traversing the dependency attribute arrays of all the drop-down boxes, screening all the elements marked as selected, and storing the id of the selected element in the integer array A;
s32: traversing a dependency attribute array in a drop-down box corresponding to the current external instruction, screening out elements marked as selected in the drop-down box, and storing the id of the selected elements in an integer array B;
s33: removing the data of the integer array A from a drop-down frame corresponding to the current external instruction according to the id of the element, and simultaneously reserving the data of the integer array B to generate an array C;
s34: and assigning the array C to a data source of a drop-down box corresponding to the current external instruction.
In order to achieve the second purpose, the technical scheme adopted by the invention is as follows:
a WPF-based drop-down box control element screening server comprises a storage and a processor;
a memory for storing program instructions;
a processor configured to execute the program instructions to perform the WPF-based drop-down box control element screening method as described above.
Compared with the prior art, the invention has the beneficial effects that: the method comprises the steps of creating a user control UserControl, creating a Button in the user control UserControl, simultaneously placing an entry control ItemsControl in the Button, popping up a drop-down frame when an external instruction is obtained, then setting a dependent attribute in a data source of the drop-down frame, assigning an array to the dependent attribute, and screening elements, so that elements selected by other drop-down frames are hidden in the drop-down frame of the WPF, only the elements selected by the current drop-down frame and unselected by other drop-down frames are reserved, and the purpose of self-defining the drop-down frame control of the WPF is achieved.
Drawings
Fig. 1 is a flowchart of a method for screening elements of a pull-down box control based on WPF according to the present invention.
Fig. 2 is a schematic diagram of an actual application of the method for screening elements of a pull-down box control based on WPF in the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it should be understood that they are presented herein only to illustrate and explain the present invention and not to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention will be further described with reference to the accompanying drawings and the detailed description below:
the first embodiment is as follows:
as shown in fig. 1-2, a method for screening elements of a pull-down box control based on WPF includes the following steps:
s1: creating a user control UserControl, and creating a Button in the user control UserControl;
specifically, a blank user control UserControl is created, at least one Button is created in the user control UserControl, and the style of the Button is set;
s2: placing an item control ItemsControl in the Button, and popping up a drop-down box outwards when acquiring an external instruction;
specifically, an item control ItemsControl is placed in the Button, and a drop-down box pops up when an external instruction is acquired, preferably, the drop-down box pops up when the Button is clicked each time
S3: and setting a dependent attribute in a data source of the drop-down box, assigning an array to the dependent attribute, and screening elements.
Specifically, a dependent attribute is set for a data source of the drop-down box, and when the drop-down box is used, work can be started only by assigning an array to the dependent attribute. In this embodiment, the S3 is specifically implemented by the following steps:
s31: traversing the dependency attribute arrays of all the drop-down boxes, screening out all the elements marked as selected, and storing the id of the selected element in the integer array A;
specifically, the dependency attribute arrays of the drop-down frames corresponding to all buttons in the user control UserControl are obtained, all elements marked as selected are screened out, and the id of the selected element is stored in an integer array A recording all the selected elements.
S32: traversing a dependency attribute array in a drop-down box corresponding to the current external instruction, screening out elements marked as selected in the drop-down box, and storing the id of the selected elements in an integer array B;
specifically, according to an external instruction, traversing the dependent attribute array in the drop-down frame corresponding to the external instruction, screening the element marked as selected in the drop-down frame, and storing the id of the selected element in the integer array B, for example, a user clicks the Button1 through a peripheral device (keyboard and mouse device, touch screen, etc.), that is, traversing the dependent attribute array in the drop-down frame 1 corresponding to the Button1, screening the element marked as selected in the drop-down frame 1, and storing the id of the selected element in the integer array B selected in the drop-down frame in a current column.
S33: removing the data of the integer array A from a drop-down frame corresponding to the current external instruction according to the id of the element, and simultaneously reserving the data of the integer array B to generate an array C;
specifically, when the data of the drop-down frame is displayed, the data of the integer array A is removed from the current drop-down frame according to the id stored in the integer array A, and meanwhile, the data of the integer array B is reserved in the current drop-down frame according to the id stored in the integer array B, so that an array C is generated.
S34: and assigning the array C to a data source of a drop-down box corresponding to the current external instruction.
Specifically, the array C is assigned to the data source of the drop-down box corresponding to the current external instruction, so that elements selected by other drop-down boxes are hidden in the drop-down box of the WPF, only the elements selected by the current drop-down box and the unselected elements of other drop-down boxes are reserved, and the purpose of self-defining the drop-down box control of the WPF is achieved
In the present embodiment, as shown in fig. 2, it is set that there is A, B, C, D as the original data, and the original data A, B, C and D are bound to the dependent attributes of each drop-down box (drop-down box 1, drop-down box 2, and drop-down box 3), where data a is selected in the drop-down box 1, data C is not selected in the drop-down box 2, and after data screening is performed on the dependent attributes by the drop-down box control element screening server based on WPF, data A, B, D is displayed in the drop-down box 1, data B, D is displayed in the drop-down box 2, and data B, C, D is displayed in the drop-down box 3.
Example two:
the utility model provides a drop-down box control element screening server based on WPF which characterized in that: comprises a storage and a processor;
a memory for storing program instructions;
a processor, configured to execute the program instructions to perform the WPF-based drop-down box control element screening method as described in embodiment one.
In the present embodiment, as shown in fig. 2, it is set that there is A, B, C, D as the original data, and the original data A, B, C and D are bound to the dependent attributes of each drop-down box (drop-down box 1, drop-down box 2, and drop-down box 3), where data a is selected in the drop-down box 1, data C is not selected in the drop-down box 2, and after data screening is performed on the dependent attributes by the drop-down box control element screening server based on WPF, data A, B, D is displayed in the drop-down box 1, data B, D is displayed in the drop-down box 2, and data B, C, D is displayed in the drop-down box 3.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (3)
1. A method for screening elements of a drop-down box control based on WPF (Windows presentation Foundation) is characterized by comprising the following steps:
s1: creating a user control UserControl, and creating a Button in the user control UserControl;
s2: an item control ItemsControl is placed in the Button, and a drop-down box pops outwards when an external instruction is obtained;
s3: and setting a dependent attribute in a data source of the drop-down box, assigning an array to the dependent attribute, and screening elements.
2. The WPF-based drop-down box control element screening method according to claim 1, wherein the S3 is specifically implemented by the following steps:
s31: traversing the dependency attribute arrays of all the drop-down boxes, screening out all the elements marked as selected, and storing the id of the selected element in the integer array A;
s32: traversing a dependency attribute array in a drop-down box corresponding to the current external instruction, screening out elements marked as selected in the drop-down box, and storing the id of the selected elements in an integer array B;
s33: removing the data of the integer array A from a drop-down frame corresponding to the current external instruction according to the id of the element, and simultaneously reserving the data of the integer array B to generate an array C;
s34: and assigning the array C to a data source of a drop-down box corresponding to the current external instruction.
3. The utility model provides a drop-down box control element screening server based on WPF which characterized in that: comprises a storage and a processor;
a memory for storing program instructions;
a processor for executing the program instructions to perform the WPF-based drop-down box control element screening method of any one of claims 1-2.
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| CN110377851A (en) * | 2019-06-18 | 2019-10-25 | 平安科技（深圳）有限公司 | Implementation method, device and the computer equipment of multistage linking combobox |
| CN114265536A (en) * | 2021-12-21 | 2022-04-01 | 广州市保伦电子有限公司 | WPF-based arc-shaped sliding control design method |
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- 2022-12-26 CN CN202211677453.9A patent/CN115981624A/en active Pending
Patent Citations (4)
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|---|---|---|---|---|
| US20040128309A1 (en) * | 2002-12-31 | 2004-07-01 | International Business Machines Corporation | Edit selection control |
| CN108038142A (en) * | 2017-11-24 | 2018-05-15 | 平安科技（深圳）有限公司 | Realize method, electronic device and the storage medium of multistage linking combobox |
| CN110377851A (en) * | 2019-06-18 | 2019-10-25 | 平安科技（深圳）有限公司 | Implementation method, device and the computer equipment of multistage linking combobox |
| CN114265536A (en) * | 2021-12-21 | 2022-04-01 | 广州市保伦电子有限公司 | WPF-based arc-shaped sliding control design method |
Non-Patent Citations (4)
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| &不羁之风&: "多个select下拉框，选中当前某一项，其他下拉框去掉选中的值", pages 1 - 2, Retrieved from the Internet <URL:https://blog.csdn.net/weixin_44538423/article/details/88252626> * |
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