vb.net选择框 vb中列表框

vb.net中怎么向excel表中添加个复选框

点击“开始”-“Excel选项”，在“基本设置”选项卡中勾选右侧的“在功能区上显示‘开发工具’”，使其显示出来。

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切换到“开发工具”功能区，点击插入”下拉列表框，在弹出的列表中选择“复选框（ActiveX控件）”。

然后在文档区域拖动以绘制一个复选框。 并在该复选框上右键单击，在弹出的菜单中选择“属性”以打开“属性对话框”。

在打开的“属性对话框”中将“Caption”设置为空，”BackStyle“设置为透明，边框效果设置为0类型，完成后关闭”属性对话框“。

在vb.net中如何实现单击按钮弹出文件选择框，效果如下这个页面中的“upload multiple files nows”按钮，

有个c#的例子，你参考一下把

Below is now the code for the main page used to upload multiple images.

Default.aspx

This is the code inside the form tag

div

asp:Label ID="Label1" runat="server" Text="Locate File:" /

asp:FileUpload ID="fileUp" runat="server" /

br /

asp:Label ID="Description" runat="server" Text="Description:"/asp:Label

asp:TextBox ID="txtDesc" runat="server" Width="349px"/asp:TextBox

asp:Button ID="btnAddFile" runat="server" Text="Add File To Upload List"

onclick="btnAddFile_Click" /

/div

div

asp:Label ID="lblCurrentFileCount" runat="server"/asp:Label

br /

asp:DataList ID="dlPhotoFiles" runat="server" RepeatColumns="10" RepeatDirection="Horizontal"

ItemTemplate

asp:Image ID="Image1" runat="server" ImageUrl='%# string.Format("~/getImage.aspx?id={0}", Eval("id")) %'

Width="50" AlternateText='%# Eval("fileDesc") %' /

br /

asp:LinkButton ID="lnkBtnRemovePhoto" runat="server"

CommandArgument='%# Eval("id") %' OnCommand="lnkBtnRemovePhoto_Command"Remove/asp:LinkButton

/ItemTemplate

/asp:DataList

br /

/div

br /

div

asp:Button ID="btnUploadFiles" runat="server" Text="Upload File(s)"

onclick="btnUploadFiles_Click" /

/div

Default.aspx.cs

This is all of the code behind:

DataSet dsPhotosFiles = new DataSet();

protected void Page_Init(object sender, EventArgs e)

{

if (Session["dsPhotoFiles"] == null)

{

this.initPhotoDS();

Session.Add("dsPhotoFiles", dsPhotosFiles);

}

else

{

dsPhotosFiles = (DataSet)Session["dsPhotoFiles"];

}

}

protected void btnAddFile_Click(object sender, EventArgs e)

{

if (fileUp.PostedFile.ContentLength 0)

{

//TODO: logic for file extension check

DataRow dr = dsPhotosFiles.Tables[0].NewRow();

string fileExt = System.IO.Path.GetExtension(fileUp.PostedFile.FileName);

byte[] imageBytes = new byte[fileUp.PostedFile.InputStream.Length];

fileUp.PostedFile.InputStream.Read(imageBytes, 0, imageBytes.Length);

dr["fileBytes"] = imageBytes;

dr["filePath"] = fileUp.PostedFile.FileName;

dr["fileDesc"] = txtDesc.Text;

dr["id"] = System.Guid.NewGuid().ToString();

dsPhotosFiles.Tables[0].Rows.Add(dr);

}

this.bindDataList();

txtDesc.Text = "";

lblCurrentFileCount.Text = "Current Files To Upload: " + dsPhotosFiles.Tables[0].Rows.Count;

}

protected void btnUploadFiles_Click(object sender, EventArgs e)

{

try

{

for (int i = 0; i dsPhotosFiles.Tables[0].Rows.Count; i++)

{

//TODO:logic to save image path and description to database

string fileName = System.IO.Path.GetFileName(dsPhotosFiles.Tables[0].Rows[i]["filePath"].ToString());

byte[] imageBytes;

imageBytes = (byte[])dsPhotosFiles.Tables[0].Rows[i]["fileBytes"];

//their is no uploading..just writing out the bytes to the directory on the web server.

System.IO.File.WriteAllBytes(Server.MapPath(string.Format("~/documents/{0}", fileName)), imageBytes);

}

//TODO: show success message logic

//clear out rows of dataset not the whole dataset

dsPhotosFiles.Tables[0].Rows.Clear();

this.bindDataList();

lblCurrentFileCount.Text = "Current Files To Upload: " + "0";

}

catch (Exception ex)

{

//TODO: show error message of which file did not get uploaded

throw new Exception(ex.Message);

}

}

private void initPhotoDS()

{

dsPhotosFiles.Tables.Add("Photos");

dsPhotosFiles.Tables[0].Columns.Add("fileBytes", Type.GetType("System.Byte[]"));

dsPhotosFiles.Tables[0].Columns.Add("filePath");

dsPhotosFiles.Tables[0].Columns.Add("fileDesc");

dsPhotosFiles.Tables[0].Columns.Add("id");

}

private void bindDataList()

{

dlPhotoFiles.DataSource = dsPhotosFiles;

dlPhotoFiles.DataKeyField = "id";

dlPhotoFiles.DataBind();

}

protected void lnkBtnRemovePhoto_Command(object sender, CommandEventArgs e)

{

foreach(DataRow dr in dsPhotosFiles.Tables[0].Rows)

{

if (dr["id"].ToString() == e.CommandArgument.ToString())

{

dsPhotosFiles.Tables[0].Rows.Remove(dr);

break;

}

}

this.bindDataList();

lblCurrentFileCount.Text = "Current Files To Upload: " + dsPhotosFiles.Tables[0].Rows.Count;

}

VB.net怎么弹出文件夹路径选择框

选择文件夹  在工具箱 - 对话框 里选择 FolderBrowserDialog 添加 到设计器中

然后 代码写在  按钮事件里

FolderBrowserDialog1.ShowDialog()

textbox1.text =FolderBrowserDialog1.SelectedPath

选择文件 在工具箱 - 对话框 里选择 OpenFileDialog

把 OpenFileDialog1.ShowDialog()

TextBox1.Text = OpenFileDialog1.FileName

写到按钮事件下

如图

点击按钮会弹出 通用对话框  选择好路径后 确定 ，编辑框里就会显示选择的路径